Balloon pump or similar article



FIG. 1 is a side elevational view of a balloon pump or similar article showing my new design, all sides being identical;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a top perspective view thereof;

FIG. 5 is a top perspective view thereof, the pump shown in an extended position. 

The ornamental design for a balloon pump or similar article, as shown and described. 